- This card's name and effect are similar to that of "Half Shut".
- A half-life is the amount of time it takes for an element to decay. After one full half-life, 50% remains of the original quantity; 25% remains after two half-lives, etc.
- Specifically, this card is referring to the half-life of C-14 atoms (which is 5730 years), as it is used in Carbon Dating archaeological items.
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